Miniaturized Probe for Time-Domain Near-Infrared Spectroscopy
| Autor: | Yuankang Lu, Sascha Weyers, Mohamad Sawan, Sreenil Saha, Frédéric Lesage |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Detector Near-infrared spectroscopy 01 natural sciences Vertical-cavity surface-emitting laser 010309 optics 03 medical and health sciences 0302 clinical medicine Single-photon avalanche diode 0103 physical sciences Miniaturization Optoelectronics Quad Flat No-leads package Photonics business 030217 neurology & neurosurgery Diode |
| Zdroj: | BioCAS |
| DOI: | 10.1109/biocas.2018.8584696 |
| Popis: | This paper concerns demonstrating the feasibility of designing a miniature optical probe for imaging applications based on time-domain near infrared spectroscopy (TD-NIRS). In a first step towards miniaturization, a compact optical probe was designed by housing Vertical Cavity Surface Emitting Laser (VCSEL) diode, Single Photon Avalanche Diode (SPAD) and control circuit in one single QFN package of dimensions 12mm × 12mm, often referred to as System-in-Package approach. The integrated optical module can provide short optical pulses at 100 MHz repetition rate, demonstrating its suitability for time-domain measurements. The experimental characterization of the time-gated detector features the ability to reject undesired strong light pulses by sharp temporal filtering of impinging photons that would otherwise mask the signal of interest. Furthermore, the size of the probe is reduced to 12 mm by 2.SD integration of all the heterogenous chips including the ancillary components on a silicon interposer platform. |
| Databáze: | OpenAIRE |
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